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Physiologic specialisation in Macrophomina phaseoli (Maubl.) Ashby., causing stem rot of jute, corchorus species

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Abstract

With eight isolates ofMacrophomina phaseoli, pathogenicity test was conducted on twenty varieties of jute belonging to two species,Corchorus capsularis andC. olitorius. Against six isolates the varieties screened showed different degrees of disease reactions while against the remaining two, all the varieties gave similar resistant reaction. As differential varieties, a minimum of four recognised the seven physiological races ofMacrophomina phaseoli. From the cultural characteristics, however, all the eight isolates differed from each other and were fitted in a dichotomous key as eight cultural races.

Zusammenfassung

Mit acht Stämmen vonMacrophomina phaseoli sind Pathogenitätstest an zwanzig Varietäten von Jute durchgeführt worden, die zwei Arten:Corchorus capsularis undC. olitorius angehören. Gegen sechs Stämme zeigten die untersuchten Varietäten einen verschiedenen Grad der krankhaften Reaktionen, während gegen die restlichen zwei Stämme alle Varietäten gleichartige Widerstandsfähigkeit aufwiesen. Mindestens vier von den sieben physiologischen Rassen vonM. phaseoli sind erkannt worden. Betreffs der Kulturcharakteristik wichen alle acht Stämme von einander ab und sind als echte Kulturrassen beschrieben.

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Ahmed, N., Ahmed, Q.A. Physiologic specialisation in Macrophomina phaseoli (Maubl.) Ashby., causing stem rot of jute, corchorus species. Mycopathologia et Mycologia Applicata 39, 129–138 (1969). https://doi.org/10.1007/BF02053486

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  • DOI: https://doi.org/10.1007/BF02053486

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